Red is not red with WLED/SK6812 RGBW

[keichitokuna]

Hello,

I've just discovered HyperHDR (I was using psieg/Prismatik with an arduino connected to WS2812b) and having completely changed my setup, I'm a bit lost.

My hardware:

• mac mini m4

• wemos D1 mini with WLED

• 162 x SK6812 RGBW

• Samsung Odyssey 49"

HyperHDR works as expected and WiFi transmission to WLED is excellent.

However, I have the impression that the red channel is rather orange or even white while the green/blue are correct.

If I switch on the LEDs via WLED, I get a "true" red, so I don't think it's a hardware problem.
I notice, however, that even on the green or blue channel, the white led seems to light up.

I've spent 1 hour trying to find a solution, but having found nothing, I think the problem is between the chair and the keyboard, so I'm coming to you for help.

I don't even know where to start debugging, to tell you the truth.

Thank you very much,

K.

[awawa-dev]

Hi
What you see is subjective, use Debug as LED driver (logging to the file) then you will see how 'red' is your captured red color. If you are using USB grabber then check wiki and LUT video calibration.

[keichitokuna]

Hello,
Thanks for the quick reply.
I am using Software Screen Capture and if i show a 1024*1024 pur red image, logs shows :

2025-07-28T22:22:17.115 | +32.3 [{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{153,22,8}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{151,22,8}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{204,30,11}{151,22,8}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{1,1,1}{153,22,8}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}{209,31,12}]

This image :

It seems, that for 255,0,0 it captures 209,31,12 which seems good to me.

The issue seems to be with the led, i always see the white lid :

Even the pure green and pure blue seems a little white in fact.

[awawa-dev]

this is after gamma 1.5, set it to gamma 1.0 and disable other not neutral settings in the processing tab if you've changed them from defaults. Still I dont know of any similar issue or workaround for macos capturing so far, usually it's not a problem but there are so many macos versions (and platforms) in use these days so hard to guarantee anything...maybe display calibration settings came into play? I dont know.